mm: rename page struct field helpers

The function names page_xchg_last_nid(), page_last_nid() and
reset_page_last_nid() were judged to be inconsistent so rename them to a
struct_field_op style pattern.  As it looked jarring to have
reset_page_mapcount() and page_nid_reset_last() beside each other in
memmap_init_zone(), this patch also renames reset_page_mapcount() to
page_mapcount_reset().  There are others like init_page_count() but as
it is used throughout the arch code a rename would likely cause more
conflicts than it is worth.

[akpm@linux-foundation.org: fix zcache]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/staging/zcache/zbud.c b/drivers/staging/zcache/zbud.c
index 328c397ea5dc..fdff5c6a0239 100644
--- a/drivers/staging/zcache/zbud.c
+++ b/drivers/staging/zcache/zbud.c
@@ -404,7 +404,7 @@ static inline struct page *zbud_unuse_zbudpage(struct zbudpage *zbudpage,
         else
                 zbud_pers_pageframes--;
         zbudpage_spin_unlock(zbudpage);
-        reset_page_mapcount(page);
+        page_mapcount_reset(page);
         init_page_count(page);
         page->index = 0;
         return page;
diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c
index 06f73a93a44d..e78d262c5249 100644
--- a/drivers/staging/zsmalloc/zsmalloc-main.c
+++ b/drivers/staging/zsmalloc/zsmalloc-main.c
@@ -472,7 +472,7 @@ static void reset_page(struct page *page)
         set_page_private(page, 0);
         page->mapping = NULL;
         page->freelist = NULL;
-        reset_page_mapcount(page);
+        page_mapcount_reset(page);
 }
 
 static void free_zspage(struct page *first_page)